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Effective Interference Cancellation Mechanism in Multi-cell

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vinayak gadad

on 16 April 2014

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Transcript of Effective Interference Cancellation Mechanism in Multi-cell

Abbreviations
Introduction
Device to Device(D2D) communication
Interference Cancellation Mechanisms
Performance simulation and analysis
Conclusion
References

Contents
3GPP- Third Generation Partnership Project
LTE- Long Term Evolution
D2D- Device to Device
UE- User Equipment
eNB- evolved Node B
A-eNB- Anchored- evolved Node B
N-eNB- Neighboring-evolved Node B
CCCH- Common Control Channel
DCCH- Data Control Channel
C_UE- Cellular user equipment
D_UE- D2D user equipment

Abbreviations
Interference Cancellation Mechanisms contd.
Development of 3GPP and LTE.
Need for accommodation of more mobile users and wider applications range.
Key motivator for utilizing direct communication in a cellular network is to keep local communication local.
D2D communication a promising component to improve spectral efficiency.
Devices operate underlay to communicate.

Introduction
Communication directly from one device to other.
It doesn’t co ordinate via central co coordinator (BS ,eNB)
Is an underlay to the cellular network .
UE transmit over direct link instead of BS.
Major advantages- low cost, plug-and-play, flexibility.





Device to Device(D2D) Communication
Performance and Simulation analysis
Interference management is a difficult job in an D2D underlaying cellular system.

Problem complexity increases in a multi-cell cellular system.

By monitoring the necessary control channels of a D2D subsystem and exchanging necessary information among multiple eNBs.

Simulations proved that performance improvement is satisfying the proposed methods.

Conclusion
Effective Interference Cancellation Mechanism in Multi-cell D2D Communication
Table 1
Table 2
Seminar by
HARSHADA HUMBARWADI
USN:2JI10EC052

Under the guidance of
Prof.PREETI DESHPANDE

Interference Cancellation Mechanisms
Proposed method for interference avoidance:

All UE’s and D2D UE’s register to its Anchored (A-eNB)

A-eNB broadcasts CCCH information on time and frequency.

C_UE decodes signaling from CCCH to obtain D_UE id and reports to A-eNB in 2 formats as shown in table 1.

If the id doesn’t belong to A-eNB then corresponding information is exchanged with N-eNB in 2 formats as shown in table 2.


Interference Cancellation Mechanisms contd.
N-eNB sends the information from step 4 to D_UE in its cell, which is used to perform reliable power control.

Based on information obtained a series of operations are performed.

CTS signaling on CCCH is monitored and priority index of D_UE is sent to its A-eNB.

A-eNB compares priority between interfering C_UE and victim D_UE.

Interference Cancellation Mechanisms contd.
Mechanisms
If D2D communication has higher priority A-eNB will stop scheduling C_UE for 1 period till D2D communication ends.

If C_UE has higher priority D2D users will share the spectrum with C_UE.

Fig 1:The complete procedure of the proposed method to avoid inter-cell near-far interference

Fig2.Average throughput vs. THinterference-cancellation when THinterference-circle is -3db and -6db when mechanism 1 is used.

Performance and Simulation analysis contd.
Fig3.Average throughput of D_UE vs. THinterference-cancellation when THinterference-circle is -4db and mechanism 2 is used

Fig4.CDF of inter-cell near-far interference from cellular transmission when THinterference-circle is -4db and mechanism 1 is used

Fig5.CDF of interference head room for mechanism 2 when THinterference-circle is -4db

Performance and Simulation analysis contd.
References
T. Koskela, S. Hakola, T. Chen, and J. Lehtomaki, “Clustering Concept Using Device-To-Device Communication in Cellular System,” IEEE Wireless Communications and Networking Conference, Apr. 2010, pp. 1–6.

Asadi, Student Member, IEEE, Qing Wang, Student Member, IEEE, and Vincenzo Mancuso, Member, IEEE, ”A Survey on Device-to-Device Communication in Cellular Networks, Arash “.

Chen Xu1, Lingyang Song1, and Zhu Han2,1School of Electrical Engineering and Computer Science Peking University, Beijing, China. 2Electrical and Computer Engineering Department University of Houston, Houston, USA.”Resource Management for Device- to-Device Underlay Communication”.

Afif OSSEIRAN, Klaus DOPPLER, Cassio RIBEIRO, Ming XIAO , Mikael SKOGLUND, Jawad MANSSOUR, “Advances in Device-to-Device Communications and Network Coding for IMT-Advanced.”

Thank You!
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